Any New York Yankees fan hoping GM Brian Cashman would swoop in and significantly bolster the team's roster ahead of the MLB trade deadline was left sorely disappointed. The most pressing question about Cashman's tenure in the Bronx is which mistakes have really cost the franchise. The Yankees ignored their weakness at third baseSt. Louis Cardinals v. New York Yankees | Hailey Leonard/GettyImagesIt might surprise quite a few Yankees fans to learn that catcher Austin Wells does not have the lowest WAR in Boone's preferred starting lineup. Brian Cashman should not have led the Red Sox outbid the Yankees for Adley RutschmanChicago White Sox v Boston Red Sox | Maddie Malhotra/Boston Red Sox/GettyImagesPlenty of people criticized the Red Sox for overpaying for Adley Rutschman at the deadline, but the Yankees should have been willing to beat out their arch rivals for the All-Star catcher. Cashman will likely be forced to accept a cut-rate deal in the offseason that helps clear up his 40-man roster.